7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.003 Low
EPSS
Percentile
68.4%
A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer ‘buf’ of size ‘size’. The variable len is assigned strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content->prefix is appended to buf (if it actually fits) whereupon (ii) content->name is written to the buffer. However, the check for whether the content->name actually fits also uses ‘len’ rather than the updated buffer length strlen(buf). This allows us to write about “size” many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | libxml2 | < 2.9.4+dfsg1-3.1 | libxml2_2.9.4+dfsg1-3.1_all.deb |
Debian | 11 | all | libxml2 | < 2.9.4+dfsg1-3.1 | libxml2_2.9.4+dfsg1-3.1_all.deb |
Debian | 10 | all | libxml2 | < 2.9.4+dfsg1-3.1 | libxml2_2.9.4+dfsg1-3.1_all.deb |
Debian | 999 | all | libxml2 | < 2.9.4+dfsg1-3.1 | libxml2_2.9.4+dfsg1-3.1_all.deb |
Debian | 13 | all | libxml2 | < 2.9.4+dfsg1-3.1 | libxml2_2.9.4+dfsg1-3.1_all.deb |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.003 Low
EPSS
Percentile
68.4%